Corey thinks that 5 + n means 5 plus a number. Is Corey correct?

Evaluate the following expression 1/3^2

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work